package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.OutputStream;
import java.util.Map;

@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @RequestMapping(path="/register", method= RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    @RequestMapping(path="/login", method= RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }

    @RequestMapping(path="/register", method = RequestMethod.POST)
    public String register(Model model, User user){
        Map<String, Object> map =  userService.register(user);
        if(map == null || map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了激活邮件，请尽快激活");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }
    // http://localhost:8080/community/activation/101/code 激活的路径
    @RequestMapping(path="/activation/{userId}/{code}", method=RequestMethod.GET)
    public String activation(@PathVariable("userId") int userId, @PathVariable("code") String code, Model model){
        int result = userService.activation(userId, code);
        if(result == ACTIVATION_SUCCESS){
            model.addAttribute("msg", "激活成功");
            model.addAttribute("target","/login");
        }else if(result == ACTIVATION_REPEAT){
            model.addAttribute("msg","无效操作，该账号已经被激活");
            model.addAttribute("target","/index");
        }else{
            model.addAttribute("msg","激活失败，您提供的激活码不正确");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";
    }

    @RequestMapping(path="/kaptcha", method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response, HttpSession session){
        // 生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        // 验证码存入session
        session.setAttribute("kaptcha", text);
        response.setContentType("image/png");
        try{
            OutputStream os =  response.getOutputStream();
            ImageIO.write(image, "png", os);
        }catch (Exception e){
            logger.error("响应验证码失败："+e.getMessage());
        }
    }

    @RequestMapping(path="login", method = RequestMethod.POST)
    public String login(String username, String password,
                        String code, boolean rememberme, Model model,
                        HttpSession session, HttpServletResponse response){
        //检查验证码
        String kaptcha = (String) session.getAttribute("kaptcha");
        if(StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg", "验证码不正确!");
            return "/site/login";
        }

        // 检查账号，密码
        int expireSeconds =  rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expireSeconds);
        if(map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expireSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path="logout", method=RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        return "redirect:/login";
    }
}
